Insulating tape



w.y R. GILLlEs INsULATING TAPE Filed Feb. 1, 152s Patented Aug. 3, 1926.

UNITED STATES PATENT OFFICE.

WILLIAIVI R. GILLIES, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION ASBESTOS &RUB- BER COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF' ILLINOIS.

INSULATING TAPE.

Application nl ed February 1, 1923. Serial No. 616,439.

My invention relates to an insulating tape" which isadapted to beapplied to fluid conducting pipes of various kinds.

The principal object 'of my present'invention is to provide such a tapewhich may be tightly and snugly spiralled around a pipe with the lateralportions of successive convolutions overlapping and interlocking witheach other; the lateral portions of the tape preferably embodying amaterial such as hemp or manila rope which after application will notstretch to any substantial eX- tent nor have its cross-sectionmaterially dise torted under the longitudinal tensile stress,

or the lateral compressive stresse-s to which it is subjected during theprocess of applying the tape to a pipe.

In the accompanying drawing illustrating my invention Figure 1illustrates the manner of applying my improved tape to a pipe;

Figure 2 is a fragmentary longitudinal l section taken on the line 2 2of Figure l;

Figure 3 is a transverse sectional view of the tape;

Figure 4 is a transverse section of the sev-l eral elements of the tapeas they appear vprior to the closing of the fabric sheath,

and

Figure 5 is a view similar to Figure 3, but

` illustrating a modified embodiment of my invention.

Similar characters of reference referto similar parts throughout theseveral views. In the drawing, A indicates the tape of my invention, B apipe to which the tape is applied, and C devices which maybe applied tothe tape at intervals, if desired.

The tape A consists of a sheath l, which is preferably formed of a heatinsulating and heat resisting material, such, for instance, asa textilefabric having woof and warp cords of asbestos fibre. The sheath 1 isformed, cementedand stitched toprovide three parallel compartments orpockets, all of which are co-extensive with the tape, namely, the middlepocket Y2 and the lateral pockets 3 and 4. It will be noted that each ofthe pockets 31and 4 is spaced from the `pocket 2 and connected therewithby aweb '5 formed by two thicknesses of the material of sheath l. y l

Disposed side byfside within the pocket 2 and extending continuously andlongitudinally therethrough is a plurality of indeand extendingcontinuously and longitudinally therethrough are the elements 7 and 8,each of which is preferably formed of a material "such as hemp or manilarope, which in contradistinction to the felt ropes 6 6 has considerabletensile strength, and is not subject to any considerable cross-sectionaldistortion under the stresses to which it is subjected during theprocess of apply ing the tape to a' pipe. f

In the manufacture of the tape of my inventi'on, the Sheath 1 isconveniently initially in the form of a long, flat strip of asbestosfabric, asbest illustrated in Figure 4. The asbestosropes or felt strips6 6 and the relatively stronger and harder ropes 7 and 8 are placedlongitudinally of the sheathed strip as shown in Fi ure 4. The edges 1**1a of the strip are t en brought together and overlapped, as illustratedin Figure 3,l and are permanently secured together in any suitablemanner, the severalA wise securing together the lateral edges of anasbestos fabric strip, as hereinbefore eX- plained. As illust-rated inFigure 5, the sheath lmay be in the form of a single piece of circularloom, conformed and stitched to provide the several pockets 2, 3 andj4.In manufacturing this type of tape, A, the stitches 9 9 are preferablymade after the materials 6, 7 and 8 have been drawn into the textilefabric. y h d In applying the tape to a pipe t at en o thetape which isfirst appliedis preferably beveled a distance equal approximately tothree times the diameter of the pipe. .One

with those turns of the tape which it overlies and by which it -isoverlaid. The ropes 7 and 8 'possess considerable tensile strength, andmay be drawn .very tightly "into the interlocking relation justdescribed. Moreover, the ropes 7 and 8 being relatively hard hold theircross-sectional shapes without appreciable distortion, and are thuscapable of maintaining' their aforesaid. interlocking relation aftersuch relation has been established. A plurality of bands or hose clampsof the type illustrated at Cmay be appliedl at intervals if desired.

From the foregoing description, it will be seen that the sheathed ropesor cords 7 and strands of material having 8 in effect constitute beadswhich are co.

extensive with but spaced from and connected to the sheathed heat'insulating material 6 by relatively thin fabric webs. The members 7 and8 when formed of hemp or manila rope have considerable value as heatinsulation, rbut it will be understood that such ropes may, if desired,be formed from a material having insulating qualities as goodorsubstantially as good as the insulating qualities of the material 6. p

' Having thus illustrated and described a preferred embodiment of myinvention, what I claim as new and desire to secure by Letters Patent ofthe United States is 1. An insulating tape comprising a central'vportion of heat insulating material, and lateral beads connected withsaid central portion by relatively thin webs.

2. In an insulating tape, a relatively wide central portion` of heatinsulating material provided at its lateral margins with depressions andbeads, the latter comprising relatively great tensile strength. f

' 3. In an insulating tape, a relatively wide central portion of heatlinsulating material webs connecting said central portions withy beads ofrelatively great tensile strength.

4. An insulating tape comprising a bodyportionprovided at each of itslateral m'argins with two longitudinal depressions and a longitudinalbead.

5. An insulating tape comprising a-central portion comprising insulatingfelt, rela# tively strong strands co-extensive with said felt and spacedlaterally therefrom, and a single textile fabric sheath enclosing saidfelt and said strands. p

6. An insulating tape comprising a central portion of insulating 4-felt,relatively strong strands co-extensive with said central portion, andspaced laterally therefrom, and a single sheath of heat resisting fabricenclosing said felt and said strands.

7. An insulating tape comprising a central portion of insulating felt, apair `of relatively strong strands co-extensive with and spacedlaterally from said central portion, and a. single fabric sheathenclosing said felt and strands, said sheath being longitudinallystitched to separate the strands from the felt.

8. An insulating tape comprising a fabric i sheath constructed toprovide a relatively large central pocket, and relatively small lateralpockets co-extensive therewith, and

. insulating felt lling said central pocket and strands of considerabletensile strength filling said lateral pockets.

9. An insulating tape comprising a central portion of insulating felt,lateral tins, embodying relatively hard material, co-extensive with saidcentral portion, and a single fabric sheath enclosing said felt andthedrelatively hard material of the fins aforesai l0. An insulating tapecomprising a tube of heat insulating fabric longitudinally stitched uponitself to aHord an elongated central pocket of considerable area intransverse cross-section and lateral pockets ofl lesser transversecross-sectional area which are co-extensive with said central pocket,

said central pocket containing a iiller in the form of a good heatinsulating material, each of said lateral pockets containing arelatively hard filler.

In witness whereof, I hereunto subscribe my name this 23rd day ofJanuary, 1923. v

VVILLIAMA R. GILLIES.

